A medical emergency on the West Coast Trail south of Pachena Bay on Vancouver Island escalated into a complex multi-agency rescue Wednesday after coastal fog grounded a planned helicopter extraction. The Alberni Valley Rescue Squad (AVRS) was called by Parks Canada late Wednesday afternoon to assist a person located about one kilometre south of the Pachena Bay Information Centre. AVRS initially responded with its regional Class D Fixed Line team and Airspan Helicopters, but as fog settled over the coast, visibility deteriorated and the planned long-line rescue could not safely proceed.